From the bestselling author of The Indispensables, the unknown and dramatic story of irregular guerrilla warfare that altered the course of the Civil War and inspired the origins of America's modern special operations forces The Civil War is most remembered for the grand battles that have come to define it: Gettysburg, Antietam, Shiloh, among others. However, as bestselling author Patrick K. O'Donnell reveals in The Unvanquished, a vital shadow war raged amid and away from the major battlefields that was in many ways equally consequential to the conflict's outcome. At the heart of this groundbreaking narrative is the epic story of Lincoln's special forces, the Jessie Scouts, told in its entirety for the first time. In a contest fought between irregular units, the Scouts hunted John Singleton Mosby's Confederate Rangers from the middle of 1863 up to war's end at Appomattox. With both sides employing pioneering tradecraft, they engaged in dozens of raids and spy missions, often